5c3925f8f9
framework was repository copied from gnu/usr.bin/gdb. * Add alpha support.
205 lines
5.8 KiB
C
205 lines
5.8 KiB
C
/* Native-dependent code for BSD Unix running on i386's, for GDB.
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Copyright 1988, 1989, 1991, 1992, 1994, 1996 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#include <machine/frame.h>
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#include <sys/param.h>
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#include <sys/user.h>
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#include <string.h>
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#include "gdbcore.h"
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#include "value.h"
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#include "inferior.h"
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int kernel_debugging = 0;
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/* Size of elements in jmpbuf */
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#define JB_ELEMENT_SIZE 8
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/* The definition for JB_PC in machine/reg.h is wrong.
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And we can't get at the correct definition in setjmp.h as it is
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not always available (eg. if _POSIX_SOURCE is defined which is the
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default). As the defintion is unlikely to change (see comment
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in <setjmp.h>, define the correct value here. */
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#undef JB_PC
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#define JB_PC 2
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/* Figure out where the longjmp will land.
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We expect the first arg to be a pointer to the jmp_buf structure from which
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we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
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This routine returns true on success. */
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int
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get_longjmp_target (pc)
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CORE_ADDR *pc;
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{
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CORE_ADDR jb_addr;
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char raw_buffer[MAX_REGISTER_RAW_SIZE];
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jb_addr = read_register(A0_REGNUM);
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if (target_read_memory(jb_addr + JB_PC * JB_ELEMENT_SIZE, raw_buffer,
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sizeof(CORE_ADDR)))
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return 0;
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*pc = extract_address (raw_buffer, sizeof(CORE_ADDR));
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return 1;
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}
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void
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fetch_inferior_registers (regno)
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int regno;
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{
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struct reg regs; /* ptrace order, not gcc/gdb order */
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struct fpreg fpregs;
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int r;
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ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) ®s, 0);
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ptrace (PT_GETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) &fpregs, 0);
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for (r = 0; r < 31; r++)
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memcpy (®isters[REGISTER_BYTE (r)],
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®s.r_regs[r], sizeof(u_int64_t));
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for (r = 0; r < 32; r++)
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memcpy (®isters[REGISTER_BYTE (r + FP0_REGNUM)],
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&fpregs.fpr_regs[r], sizeof(u_int64_t));
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memcpy (®isters[REGISTER_BYTE (PC_REGNUM)],
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®s.r_regs[31], sizeof(u_int64_t));
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memset (®isters[REGISTER_BYTE (ZERO_REGNUM)], 0, sizeof(u_int64_t));
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memset (®isters[REGISTER_BYTE (FP_REGNUM)], 0, sizeof(u_int64_t));
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registers_fetched ();
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}
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void
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store_inferior_registers (regno)
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int regno;
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{
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struct reg regs; /* ptrace order, not gcc/gdb order */
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struct fpreg fpregs;
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int r;
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for (r = 0; r < 31; r++)
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memcpy (®s.r_regs[r],
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®isters[REGISTER_BYTE (r)], sizeof(u_int64_t));
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for (r = 0; r < 32; r++)
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memcpy (&fpregs.fpr_regs[r],
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®isters[REGISTER_BYTE (r + FP0_REGNUM)], sizeof(u_int64_t));
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memcpy (®s.r_regs[31],
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®isters[REGISTER_BYTE (PC_REGNUM)], sizeof(u_int64_t));
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ptrace (PT_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) ®s, 0);
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ptrace (PT_SETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) &fpregs, 0);
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}
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/* Extract the register values out of the core file and store
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them where `read_register' will find them.
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Extract the floating point state out of the core file and store
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it where `float_info' will find it.
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CORE_REG_SECT points to the register values themselves, read into memory.
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CORE_REG_SIZE is the size of that area.
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WHICH says which set of registers we are handling (0 = int, 2 = float
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on machines where they are discontiguous).
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REG_ADDR is the offset from u.u_ar0 to the register values relative to
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core_reg_sect. This is used with old-fashioned core files to
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locate the registers in a large upage-plus-stack ".reg" section.
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Original upage address X is at location core_reg_sect+x+reg_addr.
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*/
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static void
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fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
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char *core_reg_sect;
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unsigned core_reg_size;
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int which;
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CORE_ADDR reg_addr;
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{
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#if 0 /* XXX laters */
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register int regno;
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register int cregno;
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register int addr;
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int bad_reg = -1;
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int offset;
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struct user *tmp_uaddr;
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/*
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* First get virtual address of user structure. Then calculate offset.
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*/
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memcpy(&tmp_uaddr,
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&((struct user *) core_reg_sect)->u_kproc.kp_proc.p_addr,
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sizeof(tmp_uaddr));
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offset = -reg_addr - (int) tmp_uaddr;
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for (regno = 0; regno < NUM_REGS; regno++)
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{
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cregno = tregmap[regno];
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if (cregno == tFS)
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addr = offsetof (struct user, u_pcb) + offsetof (struct pcb, pcb_fs);
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else if (cregno == tGS)
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addr = offsetof (struct user, u_pcb) + offsetof (struct pcb, pcb_gs);
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else
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addr = offset + 4 * cregno;
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if (addr < 0 || addr >= core_reg_size)
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{
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if (bad_reg < 0)
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bad_reg = regno;
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}
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else
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{
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supply_register (regno, core_reg_sect + addr);
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}
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}
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if (bad_reg >= 0)
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{
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error ("Register %s not found in core file.", gdb_register_names[bad_reg]);
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}
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addr = offsetof (struct user, u_pcb) + offsetof (struct pcb, pcb_savefpu);
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memcpy (&pcb_savefpu, core_reg_sect + addr, sizeof pcb_savefpu);
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#endif
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}
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int
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kernel_u_size ()
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{
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return (sizeof (struct user));
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}
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/* Register that we are able to handle aout (trad-core) file formats. */
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static struct core_fns aout_core_fns =
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{
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bfd_target_unknown_flavour,
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fetch_core_registers,
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NULL
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};
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void
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_initialize_core_aout ()
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{
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add_core_fns (&aout_core_fns);
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}
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